Aslong as its only flying mounts, instant ground mount in arena is super OP. Its super annoying during Halloween than everybody got the broom in arena.
Well it'd have that exception too obviously. They have crippled the game in tons of aspects around pvp anyway (e.g. nothing that walks on water works).
I would love this. I already use flying mounts for longer flights where a second here or there won't really affect anything, simply because I dislike the way the troll flight form looks. The worgen flight form is actually the only flight form I like...